PRODUCTS

Cast and pig iron

Ferroalloys

• Ferroaluminum FA30
• Ferrochrome high carbon FeCr800
• Ferrochrome low carbon FeCr005
• Ferrochrome low carbon FeCr010
• Ferrochrome low carbon FeCr025
• Ferrochrome medium carbon FeCr200
• Ferromanganese FeMn78
• Ferromanganese FeMn88
• Ferromolybdenum FeMo60
• Ferroniobium FeNb60
• Ferrosilicon FeSi10
• Ferrosilicon FeSi45
• Ferrosilicon FeSi65
• Ferrosilicon FeSi75
• Ferrotitanium FeTi35
• Ferrotitanium FeTi70
• Ferrotungsten FeW70
• Ferrovanadium FeV50
• Ferrovanadium FeV80
• Silicocalcium
• Silicomanganese SiMn17

Graphite and graphite electrodes

Modifiers for steel and cast iron

Non-ferrous metals

Ferrosilicon is a ferroalloy, the main components are iron and silicon. The ferrosilicon production process is based on the reduction of silica. Ferrosilicon is used as deoxidizing and alloying additives for the smelting of electrical, spring, corrosion and heat-resistant steels.

Brands (GOST)	Mass fraction, %
	Si	C	S	P	Al	Mn	Cr
		no more
FeSi75	74.0 - 80.0	0.1	0.02	0.04	3.0	0.4	0.3

Marks (ISO)	Mass fraction, %
	Si	Al	P	S	C	Mn*	Cr*	Ti*
			no more
FeSi75Al1	72.0 - 80.0	no more than 1.0	0.05	0.04	0.15	0.5	0.3	0.20
FeSi75Al1.5	72.0 - 80.0	1.0 - 1.5	0.05	0.04	0.15	0.5	0.3	0.20
FeSi75Al2	72.0 - 80.0	1.5 - 2.0	0.05	0.04	0.20	0.5	0.3	0.30
FeSi75Al3	72.0 - 80.0	2.0 - 3.0	0.05	0.04	0.20	0.5	0.5	0.30

Ferrosilicon is supplied in pieces weighing no more than 25 kg, in ingots weighing no more than 45 kg and in the form crushed sifted particles. Particle size ranges and tolerances shall be as given in the following table (the mass of the under-size product is established for the point of delivery of the material to the buyer):

Basic requirements
Size class	Size of pieces, mm	Maximum mass fraction of product, %
		oversize	under-slat
1	100 - 315	10	10
2	50 - 200	10	10
3	20 - 100	10	10
4	10 - 50	10	10
5	3.2 - 20	10	10
6	3.2 - 10	10	10
7	up to 3.2	10	-

Recommended requirements
Size class	Particle size ranges, mm	Maximum mass fraction of product, %
		oversize	under-slat
			total	less than 3.15 mm
1	100 - 315	10 No piece shall exceed more than 1.15 times the maximum limit of the specified size range in two or three directions.	20	6*
2	75 - 200		20	6*
3	35 - 100		18	6*
4	10 - 75		18	7*
5	3.15 - 35		8
6	3.15 - 10		10
7	3.15 - 6.3		10
8	no more than 3.15		-

* Approximate values.

When producing ferrosilicon in ingots, the amount of fines passing through a sieve with 20x20 mm holes is should not exceed: 10% of the mass of the batch - for ferrosilicon grade FeSi75.

When producing ferrosilicon of all grades in pieces weighing up to 25 kg, the amount of fines passing through the sieve with holes 20x20 mm, should not exceed 10% of the batch weight.

For long-term storage, ferrosilicon is produced with an ingot thickness of no more than 100 mm when cast in one layer or no more than 150 mm thick when cast in two layers.

Ferrosilicon should not be contaminated with foreign materials. Individual inclusions of welded sand are allowed, traces of non-stick materials and graphite, as well as slag film.

ГОСТ 1415-93 (454 Кб)

Metallurgical company "Mitra" LLC offers from stock Ferrosilicon FeSi75 at a negotiated price.